mirror of
https://github.com/pret/pokered.git
synced 2024-10-22 22:55:31 +00:00
28 lines
450 B
NASM
28 lines
450 B
NASM
WriteDMACodeToHRAM::
|
|
; Since no other memory is available during OAM DMA,
|
|
; DMARoutine is copied to HRAM and executed there.
|
|
ld c, LOW(hDMARoutine)
|
|
ld b, DMARoutine.End - DMARoutine
|
|
ld hl, DMARoutine
|
|
.copy
|
|
ld a, [hli]
|
|
ldh [c], a
|
|
inc c
|
|
dec b
|
|
jr nz, .copy
|
|
ret
|
|
|
|
DMARoutine:
|
|
LOAD "OAM DMA", HRAM
|
|
hDMARoutine::
|
|
; initiate DMA
|
|
ld a, HIGH(wShadowOAM)
|
|
ldh [rDMA], a
|
|
; wait for DMA to finish
|
|
ld a, $28
|
|
.wait
|
|
dec a
|
|
jr nz, .wait
|
|
ret
|
|
ENDL
|
|
.End:
|